Reversing valve



Juy. 22 192111.` 1,502,513

R. G. MILLER K REVERSING VALVE FledDeO. 15. 1921 2 Sheets-Sheet. l

Patented duly 22, 1924.

tHiMfED STA RUSSELL G. MILLER, or rITTsBURC-H, PENNSYLVANIA.

REVERSING- VALVE.

Application :tiled December 15, 1921.

T 0 all whom, t may concern:

Be it known that I, RUSSELL G. MILLER, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have'invented certain new and useful Improvements in Reversing Valves, of which the following is a specification.

My invention consists of an improvement in reversing valves for controlling the circulation of gases and air in furnace-construction and use.

The invention is generally similar to the well known Siemens regenerative yvalve in that it is designed `to operate in connection with such standard form of furnaces and iues, whereby to alternately directthe gas from the producer or other source to one end of the furnace or the other, and alternately open the return circulation to the stack or other outlet, the valve being operated alternately from time to time.

The object of the present invention is to simplify the construction of the valve by mounting it pivotally; to provide for water cooling of the valve and its parts; to provide for a close and accurate cut-off of the gas and simultaneous opening ofthe return flow without lost motion orleakage; and generally to produce a valve which is simple and economical in construction, adapted to effect thedesired change in the gas currents with a minimum. of movement, and to perform its functions in a satisfactory and workmanlike manner.

Referring to the drawings illustrating one preferred embodiment of the invention,

Fig. 1. is a transverse vertical sectional View of the valve in position for drawing the gases to and from the opposite ends of the furnace; Y f

e Fig. 2 is a similar View showing thevalve reversed for reverse iow;

Fig. 3 is a transverse vertical section on the line III III ofFig. 1; f

Fig. t is a view in side elevation of the valve; and

Fig. 5 is a detail View showing the valve provided with affacing` of refractory material. kn. f

Referring. to the drawing, the operating element for directing .and altering the fiow ofthe gases is pivotally mounted upon a foundation 2 2 comprising the upwardly extending terminal walls of fines 3 4: leadlas te Opposite @ads Qt a regenerative or Serial No. 522,673.

other furnace, at each side of the middle iue 5 leading to the stack or other outlet.y The construction of such furnaces and of the gas inlet and outlet portions thereof just-,referred to is too well known to require further description.

Extending upwardly above such foundation is a semicylindrical coping 6 providing a closureffor the valve and having at its upper portion a gas inlet iitting or flue 7 connected with the producer or other source of gas or air supply, and of any suitable construction with relation to cooperating valve mechanism or the like, as will be readily understood.

At each side of the middle enclosed valve cavity, iianking the end portions of coping 6, and extending downwardly within the yfoundation walls 2 2 at each side, are the end walls 8 8, providing closures for an interior space and the valve itself. End walls 8 are in the form of annular hollow boxes, preferably of ca st iron or other suitable construction, whereby to provide for a circulation of water therethrough by suitable inletI and outlet pipes 9 1() for cooling in the manner commonly practiced in similar constructions. Y

' The inner and outer walls of the closures 8 are spaced sufficiently far apart to provide for ample water circulation, and are preferably shouldered as at aA to provide for mounting on the brickwork of the walls for support. Theend Walls are centrally apertured, as shown, to provide for the extension therethrough of the end shafts 11 which are journalled in theV bearings 12 at each side, oneof such shafts 11 extending beyond the bearings and being provided with a counter-weighted operating lever 13.

The valve proper consists of a hollow casing 1-1 extending across between the end walls 8 8 and Vconnected by terminal flanges or heads 15y with ysimilar rods or iianges v16 at .the inner end of each shaft section 11. The valve -14 extends from its middle portion in opposite directions across the interior area within the end `walls and coping 6, and its range of `movement is limited by abutments 17 at the upper inner portion kof coping 6,. at each side. Atcorresponding ,aeasia y positions belowthe middle portion of the the point where the gas currents pass around at each side'in their progress toward the stack. The inner faces 21 of boxes 19 are annular with relation to the pivotal center of the valve 14, and the valve itself is provided with lateral annular extensions 22, forming continuations of the main valve, and serving as cut-ofi' portions in cooperation with the inner faces of blocks 19.

The valve as thus constructed and mounted is capable of being thrown to one position or the other by the lever 13, the counter-weight 23 of which will hold the valve denitely in either position when thrown, as illustrated in Fig. 4. The advantage of the annular extension 22 at each end portion of the valve is that it will preserve the sealing engagement between the valve and sealing face 21 of block 19, during the first portion of reverse movement, until the opposite end of the valve has come to the point of opening the circulation at the opposite side, at which time the opposite extension l22 will also be within close approach of the other end of face 21 of the other block 18. At the same time, the rising opposite end of the valve will have reached the closure position with relation to the upper incoming gas cavity, so that there will be no possibility of leakage or improper escape of gases at either side. As shown, the valve 14 extends outwardly beyond the lateral extensions 22 suiiiciently far to provide a terminal abutting portion 24, which not only engages against shoulders 17 and 18, but which also neatly interiits in the upper portion of its swinging movement in the enlarged annular recesses 25-25.

At one side of the valve cavity, the coping wall 6 is closed by a cleaning door box 26 having a hinged door 27 and an inner removable door 28, the inner face of which is annular and provides a neatly fitting closing wall for the terminal of the valve. By this construction, the operation of the valve is provided for at each side inthe same way, so that it is capable of being thrown to one posit-ion or the other to direct the gases from the producer to either end of the furnace, and from either end of the furnace tol the stack, as clearly indicated by the arrows.

The shaft sections 11, as shown, are hollow, communicating with the interior valve 14 at each inner end and aty their outer ends with water supply and exhaust pipes 29-30, with suitable fittings to provide for packing, as will be readily understood. By this means, ample cooling is ensured during the operation of the valve; i'

In Fig. 5 1 show theV hollow rotatable valve 14 provided' on its upper side with a layer of brick or other refractory material lretained by terminal lugs 32 at each end, set inwardly from the valve edgesforV clearance of the abutting shoulders' 17. By thSV construction the valve is protected from destructi-ve action of the incoming gases from the flue or port 7.

The construction and operation will be readily understood and'appreciated from the foregoing description and the valve may be, of course, made in any suitable size, or 1t may be variously'changed or modified in detail construction to adapt it to existing conditions or constructions by the skilled inechanic, but all such changes are to be considered as within the scope of the following claims.

What I claim is: Y

1. A reversing valve comprising a casing having an inlet port, a middle outlet port, and outer circulation ports, and a pivotally mounted water cooled valve extending transversely across within the casing adapted to alternately open and close each circulation port with relation to the inlet and outlet ports respectively, and having water cooled lateral extensions adapted to be located alo Y ternately between the outlet port and either circulation port.

2. A reversing valve comprising a casing having an inlet port, a middle outlet port, and outer circulation ports and a pivotally mounted water cooled valve extending transversely across within the casing Vhaving laterally extending hollow portions adapted to occupy the space between the circulating ports and the outlet port.

3. A reversing valve comprising a casing having a partly cylindrical interior and an inlet port, a middle outlet port, and outer circulation ports opening thereinto, a hollow reversing valve pivotally mounted midway across theV interior of the casing having laterally extending continuously hollow arcshaped portions, and seating members therefor located between the outlet port and the circulation ports.

4. Ay reversing valve comprising a casing having a partly cylindrical interior and an inlet port, amiddle outlet port, and outer circulation portsV opening thereinto, hollow end walls at each end of the casing, a hollow reversing valve pivotally mounted midway across the interior of the casing having lat'- erally' extending annular portions, seatirfg blocks therefor between the outlet port and the circulation ports, and means providing Y for water circulation through the end walls and the reversing valve.

5. reversing valve comprising a casing havingv a partly cylindrical interior and an inlet port, a Imiddle outlet port, and outer circulation ports openingthereinto, hollow end wallsat each end of the casing, a hollow reversing'valve pivotally mounted midway acrossthe interior of the casing having laterally extending annular portions, lseating blocks therefor between the outlet port and the circulation' ports, hollQW l'flrlilo'ns extending inwardly through the hollow end Walls and connected with the reversing valve, bearings therefor, and means providing for water circulation through the end walls, reversing valve, and seating blocks.

6. In a reversing valve, the combination with a generally Cylindrical casing provided with an inlet port, an opposite outlet port, an intervening circulation port at each side, and a valve seat between each circulation port and the outlet ort; of areversing valve consisting of a ho low water cooled shell pivotally mounted centrally of the easing and having a lateral extension at each outer swinging portion adapted to engage said valve seat at one side or the other of the outlet port.

7. In a reversing valve, the combination with a generally cylindrical casing provided with an inlet port, an opposite outlet port, an intervening circulation port at each side, and a valve seat between eaoh circulation port and the outlet port, of a reversing valve consisting of a hollow water cooled shell pivotally mounted centrally of the casing and having a lateral extension and abutment at each outer swinging portion adapted to engage said valve seat at one side or the other of the outlet port.

8. In a reversing valve, the combination with a generally cylindrical casing provided with an inlet port, an opposite outlet port, an intervening circulation port at each side, and a valve seat between eaoh eirulation port and the outlet port, of a reversing valve consisting of a hollow water Cooled shell pivotally mounted centrally of the casing and having a hollow water cooled lateral eX- tension and abutment at each outer swinging portion adapted to engage said valve seat at one side or the other of the o tlet port.

In testimony whereof I hereunto afX signature.

RUSSELL G. MILLER. 

